cregit-Linux how code gets into the kernel

Release 4.11 drivers/net/wireless/ralink/rt2x00/rt2x00usb.c

Directory: drivers/net/wireless/ralink/rt2x00
/*
        Copyright (C) 2010 Willow Garage <http://www.willowgarage.com>
        Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com>
        <http://rt2x00.serialmonkey.com>

        This program is free software; you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation; either version 2 of the License, or
        (at your option) any later version.

        This program is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
        GNU General Public License for more details.

        You should have received a copy of the GNU General Public License
        along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

/*
        Module: rt2x00usb
        Abstract: rt2x00 generic usb device routines.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/bug.h>

#include "rt2x00.h"
#include "rt2x00usb.h"

/*
 * Interfacing with the HW.
 */



int rt2x00usb_vendor_request(struct rt2x00_dev *rt2x00dev,
			     const u8 request, const u8 requesttype,
			     const u16 offset, const u16 value,
			     void *buffer, const u16 buffer_length,
			     const int timeout)
{
	struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
	int status;
	unsigned int pipe =
	    (requesttype == USB_VENDOR_REQUEST_IN) ?
	    usb_rcvctrlpipe(usb_dev, 0) : usb_sndctrlpipe(usb_dev, 0);
	unsigned long expire = jiffies + msecs_to_jiffies(timeout);

	if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
		return -ENODEV;

	do {
		status = usb_control_msg(usb_dev, pipe, request, requesttype,
					 value, offset, buffer, buffer_length,
					 timeout / 2);
		if (status >= 0)
			return 0;

		if (status == -ENODEV) {
			/* Device has disappeared. */
			clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
			break;
		}
	} while (time_before(jiffies, expire));

	rt2x00_err(rt2x00dev,
		   "Vendor Request 0x%02x failed for offset 0x%04x with error %d\n",
		   request, offset, status);

	return status;
}

Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn13068.78%342.86%


Sean Cross2915.34%114.29%


Stanislaw Gruszka2513.23%114.29%


Gertjan van Wingerde31.59%114.29%


Joe Perches21.06%114.29%


Total189100.00%7100.00%




EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request);




int rt2x00usb_vendor_req_buff_lock(struct rt2x00_dev *rt2x00dev,
				   const u8 request, const u8 requesttype,
				   const u16 offset, void *buffer,
				   const u16 buffer_length, const int timeout)
{
	int status;

	BUG_ON(!mutex_is_locked(&rt2x00dev->csr_mutex));

	/*
         * Check for Cache availability.
         */
	if (unlikely(!rt2x00dev->csr.cache || buffer_length > CSR_CACHE_SIZE)) {
		rt2x00_err(rt2x00dev, "CSR cache not available\n");
		return -ENOMEM;
	}

	if (requesttype == USB_VENDOR_REQUEST_OUT)
		memcpy(rt2x00dev->csr.cache, buffer, buffer_length);

	status = rt2x00usb_vendor_request(rt2x00dev, request, requesttype,
					  offset, 0, rt2x00dev->csr.cache,
					  buffer_length, timeout);

	if (!status && requesttype == USB_VENDOR_REQUEST_IN)
		memcpy(buffer, rt2x00dev->csr.cache, buffer_length);

	return status;
}

Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn13490.54%466.67%


Adam Baker128.11%116.67%


Joe Perches21.35%116.67%


Total148100.00%6100.00%




EXPORT_SYMBOL_GPL(rt2x00usb_vendor_req_buff_lock);




int rt2x00usb_vendor_request_buff(struct rt2x00_dev *rt2x00dev,
				  const u8 request, const u8 requesttype,
				  const u16 offset, void *buffer,
				  const u16 buffer_length)
{
	int status = 0;
	unsigned char *tb;
	u16 off, len, bsize;

	mutex_lock(&rt2x00dev->csr_mutex);

	tb  = (char *)buffer;
	off = offset;
	len = buffer_length;
	while (len && !status) {
		bsize = min_t(u16, CSR_CACHE_SIZE, len);
		status = rt2x00usb_vendor_req_buff_lock(rt2x00dev, request,
							requesttype, off, tb,
							bsize, REGISTER_TIMEOUT);

		tb  += bsize;
		len -= bsize;
		off += bsize;
	}

	mutex_unlock(&rt2x00dev->csr_mutex);

	return status;
}

Contributors
PersonTokensPropCommitsCommitProp
Iwo Mergler9571.43%120.00%


Adam Baker3123.31%120.00%


Ivo van Doorn64.51%240.00%


Stanislaw Gruszka10.75%120.00%


Total133100.00%5100.00%




EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request_buff);




int rt2x00usb_regbusy_read(struct rt2x00_dev *rt2x00dev,
			   const unsigned int offset,
			   const struct rt2x00_field32 field,
			   u32 *reg)
{
	unsigned int i;

	if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
		return -ENODEV;

	for (i = 0; i < REGISTER_USB_BUSY_COUNT; i++) {
		rt2x00usb_register_read_lock(rt2x00dev, offset, reg);
		if (!rt2x00_get_field32(*reg, field))
			return 1;
		udelay(REGISTER_BUSY_DELAY);
	}

	rt2x00_err(rt2x00dev, "Indirect register access failed: offset=0x%.08x, value=0x%.08x\n",
		   offset, *reg);
	*reg = ~0;

	return 0;
}

Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn8880.73%120.00%


Sean Cross1715.60%120.00%


Joe Perches21.83%120.00%


Bartlomiej Zolnierkiewicz10.92%120.00%


Stanislaw Gruszka10.92%120.00%


Total109100.00%5100.00%




EXPORT_SYMBOL_GPL(rt2x00usb_regbusy_read);



struct rt2x00_async_read_data {
	
__le32 reg;
	
struct usb_ctrlrequest cr;
	
struct rt2x00_dev *rt2x00dev;
	
bool (*callback)(struct rt2x00_dev *, int, u32);
};




static void rt2x00usb_register_read_async_cb(struct urb *urb)
{
	struct rt2x00_async_read_data *rd = urb->context;
	if (rd->callback(rd->rt2x00dev, urb->status, le32_to_cpu(rd->reg))) {
		usb_anchor_urb(urb, rd->rt2x00dev->anchor);
		if (usb_submit_urb(urb, GFP_ATOMIC) < 0) {
			usb_unanchor_urb(urb);
			kfree(rd);
		}
	} else
		kfree(rd);
}


Contributors
PersonTokensPropCommitsCommitProp
Johannes Stezenbach4452.38%133.33%


Ivo van Doorn2226.19%133.33%


Vishal Thanki1821.43%133.33%


Total84100.00%3100.00%






void rt2x00usb_register_read_async(struct rt2x00_dev *rt2x00dev,
				   const unsigned int offset,
				   bool (*callback)(struct rt2x00_dev*, int, u32))
{
	struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
	struct urb *urb;
	struct rt2x00_async_read_data *rd;

	rd = kmalloc(sizeof(*rd), GFP_ATOMIC);
	if (!rd)
		return;

	urb = usb_alloc_urb(0, GFP_ATOMIC);
	if (!urb) {
		kfree(rd);
		return;
	}

	rd->rt2x00dev = rt2x00dev;
	rd->callback = callback;
	rd->cr.bRequestType = USB_VENDOR_REQUEST_IN;
	rd->cr.bRequest = USB_MULTI_READ;
	rd->cr.wValue = 0;
	rd->cr.wIndex = cpu_to_le16(offset);
	rd->cr.wLength = cpu_to_le16(sizeof(u32));

	usb_fill_control_urb(urb, usb_dev, usb_rcvctrlpipe(usb_dev, 0),
			     (unsigned char *)(&rd->cr), &rd->reg, sizeof(rd->reg),
			     rt2x00usb_register_read_async_cb, rd);
	usb_anchor_urb(urb, rt2x00dev->anchor);
	if (usb_submit_urb(urb, GFP_ATOMIC) < 0) {
		usb_unanchor_urb(urb);
		kfree(rd);
	}
	usb_free_urb(urb);
}

Contributors
PersonTokensPropCommitsCommitProp
Johannes Stezenbach21692.70%133.33%


Vishal Thanki166.87%133.33%


Ivo van Doorn10.43%133.33%


Total233100.00%3100.00%




EXPORT_SYMBOL_GPL(rt2x00usb_register_read_async);

/*
 * TX data handlers.
 */



static void rt2x00usb_work_txdone_entry(struct queue_entry *entry)
{
	/*
         * If the transfer to hardware succeeded, it does not mean the
         * frame was send out correctly. It only means the frame
         * was successfully pushed to the hardware, we have no
         * way to determine the transmission status right now.
         * (Only indirectly by looking at the failed TX counters
         * in the register).
         */
	if (test_bit(ENTRY_DATA_IO_FAILED, &entry->flags))
		rt2x00lib_txdone_noinfo(entry, TXDONE_FAILURE);
	else
		rt2x00lib_txdone_noinfo(entry, TXDONE_UNKNOWN);
}


Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn3897.44%266.67%


Lucas De Marchi12.56%133.33%


Total39100.00%3100.00%






static void rt2x00usb_work_txdone(struct work_struct *work)
{
	struct rt2x00_dev *rt2x00dev =
	    container_of(work, struct rt2x00_dev, txdone_work);
	struct data_queue *queue;
	struct queue_entry *entry;

	tx_queue_for_each(rt2x00dev, queue) {
		while (!rt2x00queue_empty(queue)) {
			entry = rt2x00queue_get_entry(queue, Q_INDEX_DONE);

			if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) ||
			    !test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
				break;

			rt2x00usb_work_txdone_entry(entry);
		}
	}
}


Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn92100.00%2100.00%


Total92100.00%2100.00%






static void rt2x00usb_interrupt_txdone(struct urb *urb)
{
	struct queue_entry *entry = (struct queue_entry *)urb->context;
	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;

	if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
		return;
	/*
         * Check if the frame was correctly uploaded
         */
	if (urb->status)
		set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
	/*
         * Report the frame as DMA done
         */
	rt2x00lib_dmadone(entry);

	if (rt2x00dev->ops->lib->tx_dma_done)
		rt2x00dev->ops->lib->tx_dma_done(entry);
	/*
         * Schedule the delayed work for reading the TX status
         * from the device.
         */
	if (!rt2x00_has_cap_flag(rt2x00dev, REQUIRE_TXSTATUS_FIFO) ||
	    !kfifo_is_empty(&rt2x00dev->txstatus_fifo))
		queue_work(rt2x00dev->workqueue, &rt2x00dev->txdone_work);
}


Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn7660.32%660.00%


Johannes Stezenbach2419.05%220.00%


Stanislaw Gruszka2318.25%110.00%


Fred Chou32.38%110.00%


Total126100.00%10100.00%






static bool rt2x00usb_kick_tx_entry(struct queue_entry *entry, void *data)
{
	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
	struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
	struct queue_entry_priv_usb *entry_priv = entry->priv_data;
	u32 length;
	int status;

	if (!test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags) ||
	    test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
		return false;

	/*
         * USB devices require certain padding at the end of each frame
         * and urb. Those paddings are not included in skbs. Pass entry
         * to the driver to determine what the overall length should be.
         */
	length = rt2x00dev->ops->lib->get_tx_data_len(entry);

	status = skb_padto(entry->skb, length);
	if (unlikely(status)) {
		/* TODO: report something more appropriate than IO_FAILED. */
		rt2x00_warn(rt2x00dev, "TX SKB padding error, out of memory\n");
		set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
		rt2x00lib_dmadone(entry);

		return false;
	}

	usb_fill_bulk_urb(entry_priv->urb, usb_dev,
			  usb_sndbulkpipe(usb_dev, entry->queue->usb_endpoint),
			  entry->skb->data, length,
			  rt2x00usb_interrupt_txdone, entry);

	status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
	if (status) {
		if (status == -ENODEV)
			clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
		set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
		rt2x00lib_dmadone(entry);
	}

	return false;
}


Contributors
PersonTokensPropCommitsCommitProp
Gertjan van Wingerde7131.84%16.67%


Ivo van Doorn6930.94%960.00%


Jakub Kiciński4620.63%16.67%


Johannes Stezenbach2611.66%16.67%


Helmut Schaa104.48%213.33%


Joe Perches10.45%16.67%


Total223100.00%15100.00%



/*
 * RX data handlers.
 */



static void rt2x00usb_work_rxdone(struct work_struct *work)
{
	struct rt2x00_dev *rt2x00dev =
	    container_of(work, struct rt2x00_dev, rxdone_work);
	struct queue_entry *entry;
	struct skb_frame_desc *skbdesc;
	u8 rxd[32];

	while (!rt2x00queue_empty(rt2x00dev->rx)) {
		entry = rt2x00queue_get_entry(rt2x00dev->rx, Q_INDEX_DONE);

		if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) ||
		    !test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
			break;

		/*
                 * Fill in desc fields of the skb descriptor
                 */
		skbdesc = get_skb_frame_desc(entry->skb);
		skbdesc->desc = rxd;
		skbdesc->desc_len = entry->queue->desc_size;

		/*
                 * Send the frame to rt2x00lib for further processing.
                 */
		rt2x00lib_rxdone(entry, GFP_KERNEL);
	}
}


Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn12198.37%266.67%


Helmut Schaa21.63%133.33%


Total123100.00%3100.00%






static void rt2x00usb_interrupt_rxdone(struct urb *urb)
{
	struct queue_entry *entry = (struct queue_entry *)urb->context;
	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;

	if (!test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
		return;

	/*
         * Report the frame as DMA done
         */
	rt2x00lib_dmadone(entry);

	/*
         * Check if the received data is simply too small
         * to be actually valid, or if the urb is signaling
         * a problem.
         */
	if (urb->actual_length < entry->queue->desc_size || urb->status)
		set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);

	/*
         * Schedule the delayed work for reading the RX status
         * from the device.
         */
	queue_work(rt2x00dev->workqueue, &rt2x00dev->rxdone_work);
}


Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn96100.00%2100.00%


Total96100.00%2100.00%






static bool rt2x00usb_kick_rx_entry(struct queue_entry *entry, void *data)
{
	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
	struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
	struct queue_entry_priv_usb *entry_priv = entry->priv_data;
	int status;

	if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) ||
	    test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
		return false;

	rt2x00lib_dmastart(entry);

	usb_fill_bulk_urb(entry_priv->urb, usb_dev,
			  usb_rcvbulkpipe(usb_dev, entry->queue->usb_endpoint),
			  entry->skb->data, entry->skb->len,
			  rt2x00usb_interrupt_rxdone, entry);

	status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
	if (status) {
		if (status == -ENODEV)
			clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
		set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
		rt2x00lib_dmadone(entry);
	}

	return false;
}


Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn15894.05%466.67%


Helmut Schaa105.95%233.33%


Total168100.00%6100.00%






void rt2x00usb_kick_queue(struct data_queue *queue)
{
	switch (queue->qid) {
	case QID_AC_VO:
	case QID_AC_VI:
	case QID_AC_BE:
	case QID_AC_BK:
		if (!rt2x00queue_empty(queue))
			rt2x00queue_for_each_entry(queue,
						   Q_INDEX_DONE,
						   Q_INDEX,
						   NULL,
						   rt2x00usb_kick_tx_entry);
		break;
	case QID_RX:
		if (!rt2x00queue_full(queue))
			rt2x00queue_for_each_entry(queue,
						   Q_INDEX,
						   Q_INDEX_DONE,
						   NULL,
						   rt2x00usb_kick_rx_entry);
		break;
	default:
		break;
	}
}

Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn7392.41%880.00%


Helmut Schaa45.06%110.00%


Stanislaw Gruszka22.53%110.00%


Total79100.00%10100.00%




EXPORT_SYMBOL_GPL(rt2x00usb_kick_queue);




static bool rt2x00usb_flush_entry(struct queue_entry *entry, void *data)
{
	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
	struct queue_entry_priv_usb *entry_priv = entry->priv_data;
	struct queue_entry_priv_usb_bcn *bcn_priv = entry->priv_data;

	if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
		return false;

	usb_kill_urb(entry_priv->urb);

	/*
         * Kill guardian urb (if required by driver).
         */
	if ((entry->queue->qid == QID_BEACON) &&
	    (rt2x00_has_cap_flag(rt2x00dev, REQUIRE_BEACON_GUARD)))
		usb_kill_urb(bcn_priv->guardian_urb);

	return false;
}


Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn8686.87%562.50%


Helmut Schaa1010.10%225.00%


Fred Chou33.03%112.50%


Total99100.00%8100.00%






void rt2x00usb_flush_queue(struct data_queue *queue, bool drop)
{
	struct work_struct *completion;
	unsigned int i;

	if (drop)
		rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX, NULL,
					   rt2x00usb_flush_entry);

	/*
         * Obtain the queue completion handler
         */
	switch (queue->qid) {
	case QID_AC_VO:
	case QID_AC_VI:
	case QID_AC_BE:
	case QID_AC_BK:
		completion = &queue->rt2x00dev->txdone_work;
		break;
	case QID_RX:
		completion = &queue->rt2x00dev->rxdone_work;
		break;
	default:
		return;
	}

	for (i = 0; i < 10; i++) {
		/*
                 * Check if the driver is already done, otherwise we
                 * have to sleep a little while to give the driver/hw
                 * the oppurtunity to complete interrupt process itself.
                 */
		if (rt2x00queue_empty(queue))
			break;

		/*
                 * Schedule the completion handler manually, when this
                 * worker function runs, it should cleanup the queue.
                 */
		queue_work(queue->rt2x00dev->workqueue, completion);

		/*
                 * Wait for a little while to give the driver
                 * the oppurtunity to recover itself.
                 */
		msleep(50);
	}
}

Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn12497.64%675.00%


Helmut Schaa21.57%112.50%


Stanislaw Gruszka10.79%112.50%


Total127100.00%8100.00%




EXPORT_SYMBOL_GPL(rt2x00usb_flush_queue);




static void rt2x00usb_watchdog_tx_dma(struct data_queue *queue)
{
	rt2x00_warn(queue->rt2x00dev, "TX queue %d DMA timed out, invoke forced forced reset\n",
		    queue->qid);

	rt2x00queue_stop_queue(queue);
	rt2x00queue_flush_queue(queue, true);
	rt2x00queue_start_queue(queue);
}


Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn2970.73%360.00%


Stanislaw W. Gruszka1024.39%120.00%


Joe Perches24.88%120.00%


Total41100.00%5100.00%






static int rt2x00usb_dma_timeout(struct data_queue *queue)
{
	struct queue_entry *entry;

	entry = rt2x00queue_get_entry(queue, Q_INDEX_DMA_DONE);
	return rt2x00queue_dma_timeout(entry);
}


Contributors
PersonTokensPropCommitsCommitProp
Johannes Stezenbach31100.00%1100.00%


Total31100.00%1100.00%






void rt2x00usb_watchdog(struct rt2x00_dev *rt2x00dev)
{
	struct data_queue *queue;

	tx_queue_for_each(rt2x00dev, queue) {
		if (!rt2x00queue_empty(queue)) {
			if (rt2x00usb_dma_timeout(queue))
				rt2x00usb_watchdog_tx_dma(queue);
		}
	}
}

Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn4497.78%480.00%


Johannes Stezenbach12.22%120.00%


Total45100.00%5100.00%




EXPORT_SYMBOL_GPL(rt2x00usb_watchdog);

/*
 * Radio handlers
 */



void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev)
{
	rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0, 0,
				    REGISTER_TIMEOUT);
}

Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn23100.00%4100.00%


Total23100.00%4100.00%




EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio);

/*
 * Device initialization handlers.
 */



void rt2x00usb_clear_entry(struct queue_entry *entry)
{
	entry->flags = 0;

	if (entry->queue->qid == QID_RX)
		rt2x00usb_kick_rx_entry(entry, NULL);
}

Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn3193.94%787.50%


Helmut Schaa26.06%112.50%


Total33100.00%8100.00%




EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry);




static void rt2x00usb_assign_endpoint(struct data_queue *queue,
				      struct usb_endpoint_descriptor *ep_desc)
{
	struct usb_device *usb_dev = to_usb_device_intf(queue->rt2x00dev->dev);
	int pipe;

	queue->usb_endpoint = usb_endpoint_num(ep_desc);

	if (queue->qid == QID_RX) {
		pipe = usb_rcvbulkpipe(usb_dev, queue->usb_endpoint);
		queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 0);
	} else {
		pipe = usb_sndbulkpipe(usb_dev, queue->usb_endpoint);
		queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 1);
	}

	if (!queue->usb_maxpacket)
		queue->usb_maxpacket = 1;
}


Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn116100.00%1100.00%


Total116100.00%1100.00%






static int rt2x00usb_find_endpoints(struct rt2x00_dev *rt2x00dev)
{
	struct usb_interface *intf = to_usb_interface(rt2x00dev->dev);
	struct usb_host_interface *intf_desc = intf->cur_altsetting;
	struct usb_endpoint_descriptor *ep_desc;
	struct data_queue *queue = rt2x00dev->tx;
	struct usb_endpoint_descriptor *tx_ep_desc = NULL;
	unsigned int i;

	/*
         * Walk through all available endpoints to search for "bulk in"
         * and "bulk out" endpoints. When we find such endpoints collect
         * the information we need from the descriptor and assign it
         * to the queue.
         */
	for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
		ep_desc = &intf_desc->endpoint[i].desc;

		if (usb_endpoint_is_bulk_in(ep_desc)) {
			rt2x00usb_assign_endpoint(rt2x00dev->rx, ep_desc);
		} else if (usb_endpoint_is_bulk_out(ep_desc) &&
			   (queue != queue_end(rt2x00dev))) {
			rt2x00usb_assign_endpoint(queue, ep_desc);
			queue = queue_next(queue);

			tx_ep_desc = ep_desc;
		}
	}

	/*
         * At least 1 endpoint for RX and 1 endpoint for TX must be available.
         */
	if (!rt2x00dev->rx->usb_endpoint || !rt2x00dev->tx->usb_endpoint) {
		rt2x00_err(rt2x00dev, "Bulk-in/Bulk-out endpoints not found\n");
		return -EPIPE;
	}

	/*
         * It might be possible not all queues have a dedicated endpoint.
         * Loop through all TX queues and copy the endpoint information
         * which we have gathered from already assigned endpoints.
         */
	txall_queue_for_each(rt2x00dev, queue) {
		if (!queue->usb_endpoint)
			rt2x00usb_assign_endpoint(queue, tx_ep_desc);
	}

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn19999.50%266.67%


Joe Perches10.50%133.33%


Total200100.00%3100.00%






static int rt2x00usb_alloc_entries(struct data_queue *queue)
{
	struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
	struct queue_entry_priv_usb *entry_priv;
	struct queue_entry_priv_usb_bcn *bcn_priv;
	unsigned int i;

	for (i = 0; i < queue->limit; i++) {
		entry_priv = queue->entries[i].priv_data;
		entry_priv->urb = usb_alloc_urb(0, GFP_KERNEL);
		if (!entry_priv->urb)
			return -ENOMEM;
	}

	/*
         * If this is not the beacon queue or
         * no guardian byte was required for the beacon,
         * then we are done.
         */
	if (queue->qid != QID_BEACON ||
	    !rt2x00_has_cap_flag(rt2x00dev, REQUIRE_BEACON_GUARD))
		return 0;

	for (i = 0; i < queue->limit; i++) {
		bcn_priv = queue->entries[i].priv_data;
		bcn_priv->guardian_urb = usb_alloc_urb(0, GFP_KERNEL);
		if (!bcn_priv->guardian_urb)
			return -ENOMEM;
	}

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn15498.09%480.00%


Fred Chou31.91%120.00%


Total157100.00%5100.00%






static void rt2x00usb_free_entries(struct data_queue *queue)
{
	struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
	struct queue_entry_priv_usb *entry_priv;
	struct queue_entry_priv_usb_bcn *bcn_priv;
	unsigned int i;

	if (!queue->entries)
		return;

	for (i = 0; i < queue->limit; i++) {
		entry_priv = queue->entries[i].priv_data;
		usb_kill_urb(entry_priv->urb);
		usb_free_urb(entry_priv->urb);
	}

	/*
         * If this is not the beacon queue or
         * no guardian byte was required for the beacon,
         * then we are done.
         */
	if (queue->qid != QID_BEACON ||
	    !rt2x00_has_cap_flag(rt2x00dev, REQUIRE_BEACON_GUARD))
		return;

	for (i = 0; i < queue->limit; i++) {
		bcn_priv = queue->entries[i].priv_data;
		usb_kill_urb(bcn_priv->guardian_urb);
		usb_free_urb(bcn_priv->guardian_urb);
	}
}


Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn14197.92%480.00%


Fred Chou32.08%120.00%


Total144100.00%5100.00%






int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev)
{
	struct data_queue *queue;
	int status;

	/*
         * Find endpoints for each queue
         */
	status = rt2x00usb_find_endpoints(rt2x00dev);
	if (status)
		goto exit;

	/*
         * Allocate DMA
         */
	queue_for_each(rt2x00dev, queue) {
		status = rt2x00usb_alloc_entries(queue);
		if (status)
			goto exit;
	}

	return 0;

exit:
	rt2x00usb_uninitialize(rt2x00dev);

	return status;
}

Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn69100.00%4100.00%


Total69100.00%4100.00%




EXPORT_SYMBOL_GPL(rt2x00usb_initialize);




void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev)
{
	struct data_queue *queue;

	usb_kill_anchored_urbs(rt2x00dev->anchor);
	hrtimer_cancel(&rt2x00dev->txstatus_timer);
	cancel_work_sync(&rt2x00dev->rxdone_work);
	cancel_work_sync(&rt2x00dev->txdone_work);

	queue_for_each(rt2x00dev, queue)
		rt2x00usb_free_entries(queue);
}

Contributors
PersonTokensPropCommitsCommitProp
Stanislaw Gruszka3154.39%125.00%


Ivo van Doorn2645.61%375.00%


Total57100.00%4100.00%




EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize);

/*
 * USB driver handlers.
 */



static void rt2x00usb_free_reg(struct rt2x00_dev *rt2x00dev)
{
	kfree(rt2x00dev->rf);
	rt2x00dev->rf = NULL;

	kfree(rt2x00dev->eeprom);
	rt2x00dev->eeprom = NULL;

	kfree(rt2x00dev->csr.cache);
	rt2x00dev->csr.cache = NULL;
}


Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn54100.00%2100.00%


Total54100.00%2100.00%






static int rt2x00usb_alloc_reg(struct rt2x00_dev *rt2x00dev)
{
	rt2x00dev->csr.cache = kzalloc(CSR_CACHE_SIZE, GFP_KERNEL);
	if (!rt2x00dev->csr.cache)
		goto exit;

	rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
	if (!rt2x00dev->eeprom)
		goto exit;

	rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
	if (!rt2x00dev->rf)
		goto exit;

	return 0;

exit:
	rt2x00_probe_err("Failed to allocate registers\n");

	rt2x00usb_free_reg(rt2x00dev);

	return -ENOMEM;
}


Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn10398.10%266.67%


Joe Perches21.90%133.33%


Total105100.00%3100.00%






int rt2x00usb_probe(struct usb_interface *usb_intf,
		    const struct rt2x00_ops *ops)
{
	struct usb_device *usb_dev = interface_to_usbdev(usb_intf);
	struct ieee80211_hw *hw;
	struct rt2x00_dev *rt2x00dev;
	int retval;

	usb_dev = usb_get_dev(usb_dev);
	usb_reset_device(usb_dev);

	hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
	if (!hw) {
		rt2x00_probe_err("Failed to allocate hardware\n");
		retval = -ENOMEM;
		goto exit_put_device;
	}

	usb_set_intfdata(usb_intf, hw);

	rt2x00dev = hw->priv;
	rt2x00dev->dev = &usb_intf->dev;
	rt2x00dev->ops = ops;
	rt2x00dev->hw = hw;

	rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_USB);

	INIT_WORK(&rt2x00dev->rxdone_work, rt2x00usb_work_rxdone);
	INIT_WORK(&rt2x00dev->txdone_work, rt2x00usb_work_txdone);
	hrtimer_init(&rt2x00dev->txstatus_timer, CLOCK_MONOTONIC,
		     HRTIMER_MODE_REL);

	retval = rt2x00usb_alloc_reg(rt2x00dev);
	if (retval)
		goto exit_free_device;

	rt2x00dev->anchor = devm_kmalloc(&usb_dev->dev,
					sizeof(struct usb_anchor),
					GFP_KERNEL);
	if (!rt2x00dev->anchor) {
		retval = -ENOMEM;
		goto exit_free_reg;
	}
	init_usb_anchor(rt2x00dev->anchor);

	retval = rt2x00lib_probe_dev(rt2x00dev);
	if (retval)
		goto exit_free_anchor;

	return 0;

exit_free_anchor:
	usb_kill_anchored_urbs(rt2x00dev->anchor);

exit_free_reg:
	rt2x00usb_free_reg(rt2x00dev);

exit_free_device:
	ieee80211_free_hw(hw);

exit_put_device:
	usb_put_dev(usb_dev);

	usb_set_intfdata(usb_intf, NULL);

	return retval;
}

Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn17664.23%216.67%


Vishal Thanki3713.50%18.33%


Stanislaw Gruszka2810.22%216.67%


Gertjan van Wingerde124.38%325.00%


Christophe Jaillet72.55%18.33%


Johannes Stezenbach72.55%18.33%


Stanislaw W. Gruszka51.82%18.33%


Joe Perches20.73%18.33%


Total274100.00%12100.00%




EXPORT_SYMBOL_GPL(rt2x00usb_probe);




void rt2x00usb_disconnect(struct usb_interface *usb_intf)
{
	struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
	struct rt2x00_dev *rt2x00dev = hw->priv;

	/*
         * Free all allocated data.
         */
	rt2x00lib_remove_dev(rt2x00dev);
	rt2x00usb_free_reg(rt2x00dev);
	ieee80211_free_hw(hw);

	/*
         * Free the USB device data.
         */
	usb_set_intfdata(usb_intf, NULL);
	usb_put_dev(interface_to_usbdev(usb_intf));
}

Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn61100.00%1100.00%


Total61100.00%1100.00%




EXPORT_SYMBOL_GPL(rt2x00usb_disconnect);

#ifdef CONFIG_PM



int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state)
{
	struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
	struct rt2x00_dev *rt2x00dev = hw->priv;

	return rt2x00lib_suspend(rt2x00dev, state);
}

Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn3997.50%150.00%


Stanislaw Gruszka12.50%150.00%


Total40100.00%2100.00%




EXPORT_SYMBOL_GPL(rt2x00usb_suspend);




int rt2x00usb_resume(struct usb_interface *usb_intf)
{
	struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
	struct rt2x00_dev *rt2x00dev = hw->priv;

	return rt2x00lib_resume(rt2x00dev);
}

Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn35100.00%1100.00%


Total35100.00%1100.00%




EXPORT_SYMBOL_GPL(rt2x00usb_resume);
#endif /* CONFIG_PM */

/*
 * rt2x00usb module information.
 */

MODULE_AUTHOR(DRV_PROJECT);

MODULE_VERSION(DRV_VERSION);
MODULE_DESCRIPTION("rt2x00 usb library");
MODULE_LICENSE("GPL");

Overall Contributors
PersonTokensPropCommitsCommitProp
Ivo van Doorn272973.34%3952.00%


Johannes Stezenbach38510.35%45.33%


Stanislaw Gruszka1133.04%1013.33%


Iwo Mergler992.66%11.33%


Gertjan van Wingerde872.34%56.67%


Vishal Thanki711.91%11.33%


Adam Baker511.37%11.33%


Jakub Kiciński461.24%11.33%


Sean Cross461.24%11.33%


Helmut Schaa401.07%34.00%


Stanislaw W. Gruszka150.40%22.67%


Joe Perches140.38%11.33%


Fred Chou120.32%11.33%


Christophe Jaillet70.19%11.33%


Tejun Heo30.08%11.33%


Bartlomiej Zolnierkiewicz10.03%11.33%


Lucas De Marchi10.03%11.33%


Jeff Kirsher10.03%11.33%


Total3721100.00%75100.00%


Directory: drivers/net/wireless/ralink/rt2x00



Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.